add FAQ

README.md

@@ -50,3 +50,22 @@ Then one PR will be open for each SDKs.
 ```
 
 
+## FAQ
+
+
+Q: Why maintain some hack instead of fixing the SDKs generator.
+
+A: they are 2 problems with upgrading the generator:
+- The first is that it is not an easy task, it requires to port the patch use by the SDKs, and it requires intense testing if we don't want a regression.
+- Second problems, is that some features like `oneOf`, would require a breaking changes, so a new major versions of SDKs, which would force all clients to upgrade the code.
+
+
+Q: OK, but then why no just fix osc-api.yaml file:
+
+A: Because the API file is not bugged per-say, it just uses features that wasn't avaible the moment we made the first SDKs versions.
+
+
+Q: So that mean those weird patch will stay forever ?
+
+A: No, we might at some point upgrade every generator, and push a new major versions of all concerned SDKs, but when this will happen, we will still have to maintain old SDKs versions for a few time.
+